CN103484711A - Dezincification-resistant lead brass extruded alloy drawn pipe/bar and manufacture method thereof - Google Patents

Abstract

A disclosed dezincification-resistant lead brass extruded alloy drawn pipe/bar comprises the components in percents by weight: 61.0%-63.0% of Cu, 0.8%-2.8% of Pb, 0.01%-0.8% of Al, 0.02%-0.15% of As, 0.0013%-0.010% of B, 0.005%-0.05% of Sb and the balance Zn, wherein the impurities comprise: 0.20% or less of Fe, 0.20% or less of Sn, 0.30% or less of Ni, 0.01% or less of Mg and 0.2% or less of other elements. The manufacture method of the dezincification-resistant lead brass extruded alloy drawn pipe/bar comprises the following steps: burdening, melting, continuous casting, extruding, intermediate annealing, cold drawing and finished product annealing. Compared with the prior art, the drawn pipe/bar has the advantages that: common lead brass is taken as the base and trace alloy elements are added, so that the drawn pipe/bar is improved in dezincification corrosion resistance and refined in crystal grains; and arsenic and boron especially help to inhibit brass dezincification, and intermediate annealing helps to improve microstructure, so that the function of improving corrosion resistance of the lead brass is realized.

Description

Anti-dezincify leaded brass extruded alloy drawn tube rod and manufacture method thereof

Technical field

The present invention relates to a kind of compo pipe rod, be specifically related to a kind of anti-dezincify leaded brass extruded alloy drawn tube rod and manufacture method thereof.

Background technology

Anti-dezincify leaded brass is to take leaded brass to add the leaded brass of micro amount of arsenic, boron, antimony etc. as basis, and its cutting ability common lead brass wide and economic with application quantity with processing characteristics is identical.But the corrosion-resistant anti dezincification character of common lead brass can be low, lower than the AS2345 standard-required, its application suffered restraints.For further enlarging the use range of lead and yellow-collation copper pipe rod, be necessary that the corrosion-resistant anti dezincification character that improves this alloy can and improve its production technique.

Summary of the invention

The present invention is in order to solve above-mentioned deficiency, and a kind of anti-dezincify leaded brass extruded alloy drawn tube rod and manufacture method thereof are provided.

Above-mentioned purpose of the present invention realizes by following technical scheme: a kind of anti-dezincify leaded brass extruded alloy drawn tube rod, its alloying constituent is: composed of the following components by weight percentage: Cu:61.0%～63.0%, Pb:0.8%～2.8%, Al:0.01%～0.8%, As:0.02%～0.15%, B:0.0013%～0.010%, Sb:0.005%～0.05%, surplus is Zn; Impurity element: Fe≤0.20%, Sn≤0.20%, Ni≤0.30%, Mg≤0.01%, other element summation≤0.2%.

The manufacture method of described anti-dezincify leaded brass extruded alloy drawn tube rod comprises the following steps:

Batching: press alloy proportion batching 2500kg/ stove;

Melting: drop into the old material fusing of copper and brass in batches and stir in smelting furnace; After above-described copper, brass material all melt, add surplus zinc, aluminium and lead; All, after fusing, stir aluminium alloy and make it even in 5-10 minute, the deslagging refining that then heats up, flame refining; Add copper arsenic master alloy and copper boron master alloy, make it fully melt and stir rapidly, it is qualified that sampling detects chemical composition, standing insulation; After slagging-off, converter flow to holding furnace;

Continuous casting: carry out horizontal casting Ф 140 billets at holding furnace, casting speed is 6～10m/h, and " red ingot " draws casting, and sawing becomes spindle;

Extruding: slowly spindle is heated to 600～750 ℃ at the Sloping Hearth fuel oil heating, extrusion speed is 15～40mm/s, and extrusion ratio is 15～45, and hot extrusion must extrude the pipe rod;

Process annealing: extrude 580～600 ℃ of excellent roller bottom type continuous annealings of pipe, pass through 80～100 minutes;

Cold stretching: stretched at drawing machine after pickling is clean, obtain the drawn tube rod, pass reduction is below 25%;

Finished products: roller bottom type continuous annealing makes its mechanical property meet client's needs; Anti-dezincify test detects and meets AS2345 standard warehouse-in.

The present invention's advantage compared with prior art is: the present invention be take common lead brass as basis, add trace alloying element and improved its Dezincification corrosion resistant, refinement crystal grain, especially arsenic, boron effectively suppress dezincification of brass, process annealing improves metallographic structure, reach the effect of the corrosion resistance nature that improves leaded brass, make it to detect and meet the AS2345 standard fully through anti-dezincify test, can be used as the excellent material of anti-dezincify lead and yellow-collation copper pipe rod, for anti-dezincify brazed copper tube rod market provides in enormous quantities, anti-dezincify leaded brass novel material cheaply.

The accompanying drawing explanation

Fig. 1 is process flow sheet of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail:

A kind of anti-dezincify leaded brass extruded alloy drawn tube rod, its alloying constituent is: composed of the following components by weight percentage: Cu:61.0%～63.0%, Pb:0.8%～2.8%, Al:0.01%～0.8%, As:0.02%～0.15%, B:0.0013%～0.010%, Sb:0.005%～0.05%, surplus is Zn; Impurity element: Fe≤0.20%, Sn≤0.20%, Ni≤0.30%, Mg≤0.01%, other element summation≤0.2%.

As shown in Figure 1, the manufacture method of described anti-dezincify leaded brass extruded alloy drawn tube rod comprises the following steps:

Batching: press alloy proportion batching 2500kg/ stove;

Melting: drop into the old material fusing of copper and brass in batches and stir in smelting furnace; After above-described copper, brass material all melt, add surplus zinc, aluminium and lead; All, after fusing, stir aluminium alloy and make it even in 5-10 minute, the deslagging refining that then heats up, flame refining; Add copper arsenic master alloy and copper boron master alloy, make it fully melt and stir rapidly, it is qualified that sampling detects chemical composition, standing insulation; After slagging-off, converter flow to holding furnace;

Continuous casting: carry out horizontal casting Ф 140 billets at holding furnace, casting speed is 6～10m/h, and " red ingot " draws casting, and sawing becomes spindle;

Extruding: slowly spindle is heated to 600～750 ℃ at the Sloping Hearth fuel oil heating, extrusion speed is 15～40mm/s, and extrusion ratio is 15～45, and hot extrusion must extrude the pipe rod;

Process annealing: extrude 580～600 ℃ of excellent roller bottom type continuous annealings of pipe, pass through 80～100 minutes;

Cold stretching: stretched at drawing machine after pickling is clean, obtain the drawn tube rod, pass reduction is below 25%;

Finished products: roller bottom type continuous annealing makes its mechanical property meet client's needs; Anti-dezincify test detects and meets AS2345 standard warehouse-in.

The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification sheets of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.

Claims (2)

1. an anti-dezincify leaded brass extruded alloy drawn tube rod, it is characterized in that: its alloying constituent is: composed of the following components by weight percentage: Cu:61.0%～63.0%, Pb:0.8%～2.8%, Al:0.01%～0.8%, As:0.02%～0.15%, B:0.0013%～0.010%, Sb:0.005%～0.05%, surplus is Zn; Impurity element: Fe≤0.20%, Sn≤0.20%, Ni≤0.30%, Mg≤0.01%, other element summation≤0.2%.

2. the manufacture method of a kind of anti-dezincify leaded brass extruded alloy drawn tube rod according to claim 1 is characterized in that: comprise the following steps:

Batching: press alloy proportion batching 2500kg/ stove;

Melting: drop into the old material fusing of copper and brass in batches and stir in smelting furnace; After above-described copper, brass material all melt, add surplus zinc, aluminium and lead; All, after fusing, stir aluminium alloy and make it even in 5-10 minute, the deslagging refining that then heats up, flame refining; Add copper arsenic master alloy and copper boron master alloy, make it fully melt and stir rapidly, it is qualified that sampling detects chemical composition, standing insulation; After slagging-off, converter flow to holding furnace;

Continuous casting: carry out horizontal casting Ф 140 billets at holding furnace, casting speed is 6～10m/h, and " red ingot " draws casting, and sawing becomes spindle;

Extruding: slowly spindle is heated to 600～750 ℃ at the Sloping Hearth fuel oil heating, extrusion speed is 15～40mm/s, and extrusion ratio is 15～45, and hot extrusion must extrude the pipe rod;

Process annealing: extrude 580～600 ℃ of excellent roller bottom type continuous annealings of pipe, pass through 80～100 minutes;

Cold stretching: stretched at drawing machine after pickling is clean, obtain the drawn tube rod, pass reduction is below 25%;

Finished products: roller bottom type continuous annealing makes its mechanical property meet client's needs; Anti-dezincify test detects and meets AS2345 standard warehouse-in.

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